Metal-bending machine.



J. IVI. FEDDERS.

METAL BENDING MACHINE.

APPLICATION FILED MAR. 12l 19|4. Ll'm. Patented Aug. 3,1915.

5 SHEETS-SHEET-2.

\ EY gaz/z ATTURNEY'@ I. M. FEDDERS.

METAL BENDING MACHINE.

APPLICATION FILED MAR. I2. 1914. LM270. PatentedAug.' 3,1915.

5 SHEETS-SHEET 3.

fm @MQ/. ATTE RN EYE.

J. IVI. FEDDERS.

METAL BENDING MACHINE.

APPLlcAnoN FILED MAR.12.1914.

Patented Aug. 3, 1915.

5 SHEETS-SHEET 4.

Irv/ENTER Q r.; |1| ma Q QN K..

MTE ir. W/

m, w W

l. IVI. vFEDDE-FS. METAL BENDING MACHINE. APPL|CAT10N HLED r11/111.12.1914.

Patented Aug. 3, 1915.

5 SHEETS-SHEET 5.

INVENTEIR tw 5MM/@Wk ATTQRNEY.

UNITED STATES PATENT OFFICE.

iTOHN-M. FEDDERS, .0F BUFFALO, NEW YORK, ASSIGNOR TO FEDDERSMANUFACTURING COMPANY, INC., 0F BUFFALO, NEW YORK, A CORPORATION 0F NEWYORK.

METAL-BENDING MACHINE.

le it known that I, JouN M. F EnpEns, a citizen of the llnited States,residing at Butl'alo, in the county of Erie and btate of New York, haveinvented new and useful Improvements in l\letal-Bend1ng Machines, ofwhich the followi 1g is a specification.

This invention rel: t ys to a machine for producing plaits. folds orcorrugations at inter vals ou a. strip of metal which 1s to be used forforming the water and airtubes of an automobile radiator, although themachlne may also be used for plaiting strlps of this character for otherpurposes.

1t is the object of this invention to provide a machine whereby plaitedstrips 0f sheet metal may be produced expeditiously, reliably andeconomically.

1n the accompanying drawings: Flgure 1 is a `side elevation of a sheetmetal. plaiting or corrugating machine embodying my 111e vention. Fig. 2is a sectional top plan View of the same with the Aupper rollers 0f thepreliminary and final 'plaiting devices omitted. Fig. 3 is a fragmentaryvertical longitudinal section, on an enlarged scale, taken in line 3 3,Fig. 2, and showing the preliminary and'the final plait forming devices.Fig. 4 is a similar view, on a stlll larger scale, showing only theoperative portions of the preliminary and final plait forming devices.Fig. 5 is a. fragmentary vertical transverse section, on a reducedscale, taken in line 5 5, Fig. Fig. (3 is a fragmentary section, on anenlarged scale, of the upper preliminaryvplaiting roll, taken in line 66,

vFig. 3. Fig. 7 is a fragmentary face View of this last mentioned roll.Fig. S is a fragmentary face view of the lower preliminary plaitng roll.y Fig. 9 is a fragmentary section, taken in line 9-9 Fig. 4, showing thecooperating parts of the preliminary plaiting rolls. Fig. 10 is afragmentary section taken in line 10-10, Fig. 4 showing the cooperatingparts of the final plaiting rolls. Fig. 11 is a fragmentary sectionalface View of the lower plaiting roll, the section being taken in line11-11, Fig. 10. Fig. 12 is a fragmentary face view of the upper finalplaiting roll. IFig. 13 is a detached side elevation of two adjacentshifting bars which form part of the mechanism whereby the finalplaiting rolls and the parts associated therewith are operated. Fig. 14is a fragmentary vertical longitudinal section Show- Specication ofLetters Patent.

to serve this purpose.

Patented A ug. 3, 1915.

Application led March 12, 1914. Serial No. 824,114.

ing a modified construction of the means whereby the completion of theplaits in the strip of metal is effected. Fig. l5 is a fragmentary crosssection, on an enlarged scale, taken in line 15-15, Fig. 14.

Similar characters of reference indicate corresponding parts throughoutthe several views.

Although this machine may be organized for plaiting or corrugatingstrips of sheet metal for producing various articles, that shown in thedrawings is designed more particularly for producing plaited radiatorstrips which comprise a plurality of longitudinal Webs l, a plurality`of transverse plaits 2 each of which has the outer edges of its wallsunited while the inner edges of these Walls are connected respectivelywith the opposing ends of two adjacent webs, longitudinal offsets 3formed at the o posite ends of the webs, longitudinal o sets 4 formed onopposite ends of the opposing sides of the walls of the plaits, andtransverse beads 5 formed on each web parallel with the plaits andextending from one oil'- set to the other of the respective web, asshown in Figs. 4, 9 and 10.

In its general organization this machine comprises a pair of cooperatingpreliminary plaiting rolls to which the blank or unplaited sheet orstrip of metal is supplied by any suitable means and which operates toproduce a succession of partly formed plaits at intervals on the'strip,and a pair of final plaiting rolls which receive the strip from thepreliminary plaiting rolls and operate upon the same to complete theformation of the plaits so that the strip is ready to be assembled withother parts for producing an automobile radiator. The working parts ofthe machine are mounted in a main frame 6 which may Le of any suitableconstruction The preliminary plaiting rolls preferably comprise a lowerroll or roller 7 mounted on a horizontal shaft 8 which is journaled insuitable transverse bearings on the frame and provided on its peripherywith an annular row of die grooves 9 which are arranged parallel with.the axis of this roll, and above this lower roll is arranged an upperpreliminary plaiting roll or roller 10 which is mounted on a horizontalshaft 11 journaled transversely in suitable bearings on the main frameand provided on its periphery with an annular -row of longitudinal dieblades 12 which are arranged parallel with theraXis of this lastvmentioned roller and are adapted `to engagzev versely in suitablebearings on the main frame in front of the preliminary plaiting Vrollsand provided at one end with tight and loose pulleys 16, 17 adapted toreceive a driving belt, and a horizontal counter shaft 18 journaledtransversely in the lower part of the main frame and provided at one endwith a gear wheel 19 which meshes with a gear pinion 20 on the drivingshaft and provided at its other end with a gear pinion 21 which mesheswith the gear wheel 14 of the shaft of the lower preliminary plaitingroll.

The. die blades of the upper plaiting roll are preferably made separatefrom the body of this roller and seated at their innei` edges inlongitudinal channels 22 formed in the periphery of this roll so as topermit of re newing these blades from time to time as they become wornout. In order to conne these die blades in the channels of the body ofthe roll 10 each of the die blades is provided at its opposite endsadjacent to its inner edge with a pair of laterally projecting lockinglugs 23 which are engaged by locking disks or'plates 24 detachablysecured to opposite ends of the upper preliminary roll body by means ofscrews 25, as shown in Fig. 6 or otherwise, and provided on the innersides of their peripheral portions with annular grooves 26 which receivethe lock'- ing lugs 23. By this means the preliminary plaiting bladescan be readily removed when worn and interchanged for new ones withoutdismantling any considerable portion of the machine. As the strip ofmetal is fed forwardly between this pair of preliminary plaiting'rollersa plurality of longitudinal webs and plaits are formed in alternationthereon. At they same time that the plaits are formed on the strip thebeads 'on the webs are also formed by longitudinal ribs 27 arranged onthe periphery of the lower 'preliminary plaiting roller between the diegrooves 9 thereof and engaging withA longitudinal die grooves 28formedon the upper plaiting roller between the blades thereof and whilepassing between this pairl of plaiting rollers the longitudinal offsets3 are produced at opposite-ends of the webs by circumferential ribs 29varranged at opposite ends of the lower preliminary plaiting rolleri'engaginigtj icorrespondil'ig-i' vz; 30 mths-'upper ypwlreims' plaitingrollen* and the'ofsets .4a'tv. correspondingends of.r

the walls jofjtheyfplaitsam formed on, lthe same side .of the' strip?Ias the longitudinal o 'sets `of the'webs, by'providing the oppositeendsAof each die groove 9 in the lower lplaiting roller with loffsets 31whichfare adapted to .coperate withl corresponding Y depressions 32 onthe sides of the die blades v12 at opposite ends'thereof. Alfter* thepreliminary plaitingof the strip has been thus effected the same passesforwardl between the members of the secondary o rv nal plaiting devicewhich completes the formation of the plaits. This final plaiting devicecom-Y prises an upper die or plaiting roll or roller 33 which ismountedron a horizontal shaft 34 journaled transversely in suitablebear.- ings on the main frame and provided in its periphery withlongitudinal grooves 35 adapted to receive the beads of the websand alsoprovided adjacent to its opposite ends with circumferential grooves orrecesses 36 f which are adapted to receive the longitudinal offsets ofthe webs, as shown in Fig. 10. Below the upper final plaiting roll isarranged a final plaiting roll or supporting roller 37 which is mountedon a horizontal shaft 38 journaled transversely in suitable bearings onthe main framel and provided on its periphery with a plurality of diesections 39 which are movable .circumferentially relative to the body ofthe lower inal plaiting roll and adapted to coperate with the upper inalplaiting roll. Each of these die sections is constructed in the form ofa transverse bar which is capable of moving circumferentially to alimited extent on the periphery of the lower final plaiting roll byproviding the periphery ofthe latter with a series of transverse grooves40 each of which receives the narrow inner'portion 41 of one of the diesections, eachof said inner portions being of greater width than thewidth of the reduced inner portion of the companion die section. Theouter peripheral side or face of each die section is provided with atransverse die rib 42 which is adapted to engage with the concave sideof the bead on a. web of the plait'ed strip of metal,two-circumferential ribs 43 arranged at opposite ends of the peripheralface of the die section and adapted to engage with the longitudinaloffsets of the webs, and the radial sides'of each die section areprovided at their opposite endsA with laterally offset two plates ordisks secured to opposite ends of the lower filial plaiting roll bymeans of screws 4G, as shown in Fig. 10, or otherwise, and provided onthe inner opposing sides of their marginal portions with circumferentiallocking grooves 47 which receive locking lugs t8 formed at opposite endsof the die sections adjacent to the inner edges thereof.

The strip with the partially formed plaits thereon is fed between theopposing faces of the upper final plaiting roller and the die sectionsof the lower final plaiting roller and as this strip passes betweenthese parts the walls of each plait are pressed toward each other sothat the opposite ends of the walls of each plait engage with each otherwhile the intermediate parts of the same are slightly separated, therebyputting the strip `in readiness for assembling with other parts of theradiator. As the strip having the partially formed plaits approaches theincoming side of the upper andflower final plaiting rollers each of thepartially formed plaits passes between the opposing radial sides of twoadjacent die sections which latter are at this time separated to permitof the entrance of the respective plait between the same and theadjacent webs are arranged upon the circumferential face of the two diesections. After each plait has been thus deposited between two diesections that die sect-ion in rear ofthe plait is pushedcircumferentially forward toward the die section in front of the plaitwhereby the plait is pinched between the die sections and closed and itsformation is completed. Upon thus pushing each die section forwa rdlyits longitudinal die rib 42 is brought in line with a longitudinalgroove 35 of the t upper plaiting final roller So'that the companiontransverse bead of the adjacent web is gripped between the same, therebyinterlocking the respective die section and the upper final plaitingroll and causing the respective die section to operate as an abutmentagainst which the next following die section is pushed for completingthe forj mation of the next following-,plait in the strip. terlockingengagement with the upper final plaiting roll on the front or outletside of the same these die sections again separate circumferentiallyfrom each other in succession and permit the completely formed orvfoldedplaits to withdraw therefrom and enable the strip to slide tangentlallyrelatively thereto over a delivery table 49 arranged tangentiallyadjacent to the outlet side of the lower final plaiting roller.

The forward movement of the final plaiting rollers is effected solely bythe pushing operation which is exerted against the die sections in theact of completing the formation of theplaits, whereby proper engage- Asthe die sections move out of inment of the surfaces of the finalplaiting roller and associated parts with the previously formed surfacesof the strip is insured without -necessitating any accurate relativeadjustment of these parts to secure harmony of action. The preferredmeans for effecting this forward movement of the two'teeth 52, 53 whichare arranged one behind the other while the rear end of each of thesebars is guided on the adjacent part of the main frame preferably bymeans of a roller 5st mounted on the frame and engaging with theunderside of the shifting bar and a guide lug 55 projecting inwardlyfrom the main frame into engagement with the upper side of the shiftingbar. These shifting bars are so operated that the members of each pairat opposite ends of the final plaiting rollers move forwardly while theother pair move rearwardly. ADuring the forward movement of each-pairthe front teeth thereof engage with the rear side of one of the diesections at opposite ends thereof and move the same tightly against thepreceding die section while the rear teeth thereof engage with the rearside of the next following die section at opposite ends thereof and movethe same with the die section lwhich is engaged by the front teeth. Topermit the shifting bars to thus engage with the opposite ends of thedie sections these ends are reduced, as shown at 56in Figs. 2 and 11,whereby the teeth of the shifting bars are enabled to enter between theend portions of the die sections.

The oscillating or reciprocatingmovement ofthe shifting bars ispreferably effected by providing each Iof the shifting bars on itscentral part with a yoke or guideway 57 for two transversely slidingshoes 58 which receive between them a crank or eccentric 59 formed onthe adjacent-part of the driving shaft. The cranks for one pair ofshifting bars are arranged diametrically opposite the cranks for theother pair of shifting bars so that during the rotation of the drivingshaft one pair of shifting ,bars is moved forwardly for completing theformation of a plait while the other pair and are then depressed intoengagement with theend portions ofthe next following die sections, forwhich purpose these shift- -ing bars are held yieldingly in their lowerposition by tension devices each of which comprises a vertically movableslide guided in a bracket 61 on the adjacent part of the main frame andprovided at Aits lower end with an anti-friction roller 62 engaging withthe upper side of the yoke of the respective shifting bar, and a spring63 mounted on said bracket and engaging with the upper end of saidslide, as shown in Figs. 1, 3 and 5.

he upper and lower plaiting rollers are compelled to turn together bymeans of intermeshing gear wheels 64,65 secured to the correspondingends of the shafts of these rollers. These gear wheels are preferably ofthe same diameter, as -shown in Fig. 1, but in order to compensate fortheslack between the several die sections mounted on the periphery ofthe lower final plaiting roll the diameter of the latter and the radial'thickness of the die sections taken together is made sufficientlygreater than the diameter of the upper inal plaiting roller, as showninFig. 3, so as to compensate for this slack and. permit the die sectionswhile in engagement with the periphery of the upper nal plaiting roll tomove at the same rate of. speed, thereby insuring proper engagement ofthe gripping surfaces -of the upper final plaiting roller and the diesections with opposite sides of the plaited or j corrugated strip ofmetal.

' In order to assist the upper final plaiting ing rollers and aboveopposite ends of the dic sections as they issue forwardly from betweensaid rollers so thatl each of these die sections in turn engages itsopposite ends with the teeth on the lower sides of the retarding wheelsand causes the latter to be turned forwardly. This movement of theretarding wheels is frictionally resisted preferably by the means whichare shown in the drawings and which comprise a driving gear ywheel 67connected with each retarding wheel on the outerside thereof and meshingwith a driven gear wheel 68 ar` ranged in front of the same, a shaft 69carrying the driven gear wheel 68 and prol ing the brake band tightljTaround the brake drum. By this means a frictional resistance 1sproducedwhlch acts in opposition to the forward turning movement, of thetwo retarding wheels so that the teeth of the latter by engaging withthe front side of opposite ends of thedie sections operate to resist theforward movement of these die sections and aid not only in holding theforemost operative die sections back and aiding the upper feeding rollerto form an abutment against which the trailing members'of the operativedie sections are ressed, but also causing the die sections a terclearing the upper nal plaiting roll on the front side thereof to remainclamped` together for a short time and thereby properly control themovement of the completed strip as it passes from the final'plaitingrollers to the receiving table.

At times it is desirable tol move the retarding wheels out of theiroperative position, for instance, when it is desired to draw a strip ofmetal through the machine when getting the machine ready-and also when astrip has to be removed which has accidentally become jammed in themachine, at which time the retarding wheels should be out of the way inorder' to avoid interference with the free rotation of the die sections.This is made possible by mounting the shafts 69 in fixed bearings 'onthe main frame and providing shifting levers 91 each of whichl ispivoted to turn concentrically about `one of the shafts 69 and isprovided on its rear arm with a pivot $22 upon which one of theretarding and driving gear wheels turns while its front arm isyieldingly ressed upwardly by means of a spring 2 interposed between theunderside of this front arm and the adjacent part of the main frame. Theposition of each revtarding wheel relative to the corresponding ends ofthe die sections may be adjusted by means of an upright adjusting bolt 73 passing through corresponding openings in the front arm of therespective shifting lever and the adjacent part of the frame and havingits head 74 engaging the underside of the frame and its screw nutk 75bearing against the upper side of the front arm of the adjusting lever.Upon turning the screw nut 7 5 in one direction or the other theshiftinglever may be turned so as to engage the teeth of the retardingwheel the required extent with the ends of the companion die sections.

Instead of mounting the die sections on a A.

rotatable supporting roll as shown in the construction represented inFigs. 1-13, the

projecting guide lugs 77 which slide in oval guideways 78 formed inplates 79 secured to the adjacent parts of the statlonary mam frame S0.'.lhese die sections are pushed one 1 at a time forwardly by means ofshifting bars S1 similar to the shifting bars shown in -Figs. 2, 3 and13, so that each die section is in turn pushed forwardly into engagementwith the periphery of the upper linal plaiting roller 82 and the nextpreceding die section for causing a partially formed plait of the stripbetween the same to be converted into a completely formed plait. As eachdie section clears the final plaiting roll 82 on the front side thereofthe same pushes the next die section in advance of the 'same forwardly,which movement is in turn transmitted successively to the several diesections so that the same are caused to travel around the oval path ofthe guideways until they again reach the position where they are pushedforwardly by the shifting bars. 1V hen employing this stationary form ofsupport or guide for the die sections the opposite ends of the diesections may be engaged by the star wheels83 of a retarding devicesimilar to that shown in Figs. 2 and 3 for controlling the movement ofthe die sections on the delivery side of the upper final plaitingroller.

This machine for producing plaited strips of sheet metal can be operatedvery rapidly so as to secure a comparatively large output of sucharticles, the same requires comparatively little power for itsoperation, its working parts are not subjected to undue wear, and it isnot liable to get out of order easily.

I claim as my invention: v

l. A machine for bending sheet metal comprising a plurality of diesections arranged iny an endless row andadapted to receive between thempartially formed'plaits on a sheet of metal, and means for causing4adjacent die sections to be moved relatively to each other for engaginga plait of said sheet between the same.

2. A machine for bending sheet metal comprising a plurality of diesections arranged in an endless row and adapted to receive between thempartially formed plaits on a sheet of metal means for causing adjacentdie sections to be moved relatively to each other f or engaging a plaitof said sheet between the same, and a roller coperating with the outerfaces of said die sections.

3. A metal bending machine comprising a plurality of die sectionsarranged in an endless row, each two adjacent die sections be= ingmovable relatively and adapted to receive between them the plait of asheet of ing shifting bars provided with teeth adapted to engage withopposite ends of the die sections.

5. A metal bending machine comprising al plurality of die sections, eachtwo adjacent die sections being movable relatively and adapted toreceive between them the plait of a sheet of metal, and means for movingsaid die sections forward successively, comprising shifting'barsprovided with teeth adapted to engage with opposite ends of the diesections and means for reciprocating said shifting bars.

A metal bending machine comprising a plurality of die sections, each twoadjacent die sections being movable relatively and adapted to receivebetween them the plait of a sheet of metal, and means for moving saiddie sections forward successively, comprising shifting bars providedwith teeth adapted to engage with opposite ends of the die sections andmeans for reciprocating said shifting bars comprising a shaft havingcranks operatively connected with said shifting bars.

'7. A metal bending machine comprising a plurality of die sections, eachtwo adjacent die sections beingY movable relatively and adapted toreceive between them the plait of a sheet of metal, and means forpushing said die sections forwardly in succession comprisingreciprocating shifting bars provided at their front ends with teethengaging with opposite ends of said die sections, guides for the rearends of said shifting bars, a shaft provided with cranks operativelyconnected with the central parts of said shifting bars, and means forholding said shifting bars yieldingly in engagement with said diesections.

8. A metal bending machine comprising a plurality of die sections, eachtwo adjacent die sections being movable relatively and adapted toreceive between them the plait of a sheet of metal, and means forpushing said die sections forwardly in succession Acornprisingreciprocating shifting bars provided at their front ends with teethengaging with opposite ends of said die sections, guides for the rearends of said shifting bars, a shaft provided with cranks operativelyconnected with the central parts of said shifting bars, and means forholding said shifting bars yieldingly in engagement with said diesections comprising slides hav- -ing rollers engaging with said shiftingbars, brackets in which said slides are guided and springs mounted onsaid brackets and operating against said slides. 1

9. lA metal bending machine comprising an endless row of die sections,`a support upon which said die sections are mounted, means forsuccessively moving said die sections relative to each other and into anoperative position and a roller coperating successively with the outerfaces of said die sections.

10. A metal bending machine comprisingy a supporting roller, and aplurality of die sections mounted in an endless row on the periphery ofsaid supporting roller and capable of circumferential movement thereonrelatively to each other.

11. A metal bending machine comprising a supporting roller, a pluralityof die sections mounted in an endless row on the periphery of saidsupporting roller and capable of circumferential movement thereonrelatively to each other, anda die roller cooperating with the outerfaces of said die sections.

12. A metal bending machine comprising a supporting roller, a pluralityof die sections mounted in an endless row on the periphery of saidroller and capable of circumferential movement thereon relatively toeach other, and means for limiting the circumferential movement of eachdie section on said supporting roller.

13. A metal bending machine comprising a supporting roller, a pluralityof die sections mounted in an endless row on the periphery of saidroller and capable of circumferential movement thereon relatively toeach other, and means for limitingthe circumferential movement of eachdie section on said `supporting roller, comprising longitudinal groovesformed on the periphery of said supporting roller and each adapted toreceive the inner portion of one of said die sections.

14. A metal bending vmachine comprising a supporting roller, a pluralityof die sections mounted in an endless row on the periphery of saidsupporting roller and capable of a limited circumferential movementthereon relatively to veach other, and means forconning said diesections on the supporting roller.

15. A metal bending machine comprising a supporting roller, a pluralityof die sectionsl mounted on the periphery of said supporting roller landcapable of a limited circumferential movement thereon,

and means for confining said die sections on the `supporting rollercomprising laterally projecting lugs. arranged at opposite ends of the"die sections, vand locking v plates secured to opposite ends of thesupporting roller ingame and provided with grooves which Areceive saidlocking lugs.

16. A metal bending machine comprlsmg a supporting roller, a pluralityof die sections mounted in an endless row on the periphery of thesupporting roller and caporting roller and capable of circumferen-` tialmovement thereon, and a die roller having its periphery coperating withthe peripheral faces of said die sections, the pitch line of the severaldie sectionsbeing greater than" the pitch line of said die roller.

18. A metal bending machine comp-rising a supportingv roller, aplurality of die sections mounted on the periphery of the sup portingroller and capable of circumferential movement thereon, a die rollervhaving its periphery coperatingwith the periph-- eral faces of said diesections, the pitch line of the several die sections being greater thanthe pitch line of said die roller, and means for turning said supportingroller and die roller in unison.

19. A- metal bending-machine comprising a supporting roller, a pluralityof die sections mounted on the periphery of the supporting roller andcapable of circumferential movement thereon, a die roller having itsperiphery .cooperating with the peripheral faces of said die sections,the pitch line ofthe several die sections being greater than the pitchline of said die roller, and means for turning said supporting rollerand die roller in unison consisting ofkintermeshing gear Wheels of likediameter connected with said rollers. a

20. A metal bending machine comprising a plurality of die sections,arranged in an endless row, a support upon" which said die sections aremovably mounted relatively to each other, means for advancing said diesections, and means for retarding the for- Ward movement of said diesections. i 21. A metal bending machine comprising a plurality of diesections, a support upon which said die sections are movably mounted,means for advancing said 'die sections,

and means for retarding the forward movement of said die sectionslcomprising star Wheels having teeth adapted to 'be engaged by oppositeends of the die sections.

22. A metal bending machine comprising a plurality .of die sections, vasupport upon which said ldie sections are movably mounted, meansforadvanclng sald dle sectlons,

and means for retarding the forward movement of sa1d die` sectlonscomprlsing star wheels having teeth adapted to be engaged by oppositeends of the die sections and means for retarding the forward rotation ofsaid star wheels.

23. A metal bending machine comprising a plurality of die sections, asupport upon which said die sections are movably mounted, means foradvancing said die sections, and means for retarding the forwardmovement of said die sections comprising star wheels having teethadapted to be engaged by opposite ends of the die sections and means forretarding the forward rotationof said star wheels comprising drivinggear wheels` connected with said star wheels, driven gear wheels meshingwith said driving gear wheels, brake drums operatively connected withsaid driven gear wheels, and brake bands engaging with said brake drums.

24. A metal bending machine comprising a plurality of die sections, asupport upon which said die sections are movably mounted, means foradvancing said die sections, and means for retarding the forwardmovement of said die sections comprising star wheels having teethadapted to be engaged by opposite ends of the die sections and means formoving each of said star wheels toward and from the path of said diesections.

25. A metal bending machine comprising a plurality of die sections, asupport upon which said die sections are movably mounted, means foradvancing said die sections, and means for retarding the forwardmovement of said die sections comprising star wheels having teethadapted to be engaged by opposite ends of the die sections and means forretarding the forward rotation of said star wheels comprising drivinggear Wheels connected with said star wheels, driven gear Wheels meshingwith said driving gear wheels, brake drums operatively ed, 'meansforadvancing said die sections,

and means for retarding the forward movement of said die sectionscomprising star wheels having teeth adapted to be engaged by oppositeends of the die sections and means for retarding the forward rotation ofsaid star wheels comprising driving gear wheels connected with said starwheels, driven gear wheels meshing with said driving gear wheels, brakedrums operatively connected with said driven gear wheels,- brake bandsengaging with said brake drums, and means for adjusting said star wheeltoward and from the die sections comprising a rock lever pivotedconcentrically with said drum and driven gear wheel and having one ofits arms supporting the adjacent star wheel and driving gear wheel, aspring engaging with the other arm of said shifting lever and operatingto turn the same in the direction for carrying the teeth of the starwheel into the path of said die sections, and an adjusting bolt havingits head and nut engaging one with the stationiry part and the otherwith said adjusting ever.

Witness myhand this 10th day of March, 1914.

` JOHN M. FEDDERS.

Witnesses:

THEO. L. PoPP, ANNA HEIGIs.

